#region 公式算法
        /// <summary>
        /// 可用資金公式 [權益-保證金]
        /// </summary>
        /// <param name="balance">權益</param>
        /// <param name="currmargin">保證金</param>
        /// <returns></returns>
        private decimal AvailableExpression(decimal
 
 balance, decimal currmargin) {
            return balance - currmargin;
        }

        /// <summary>
        /// 權益公式 [昨權益+入金-出金+平倉盈虧+持倉盈虧-手續費-交割手續費]
        /// </summary>
        /// <param name="prebalance">昨權益</param>
        /// <param name="deposit">入金</param>
        ///
 
 <param name="withdraw">出金</param>
        /// <param name="closeprofit">平倉盈虧</param>
        /// <param name="positionprofit">持倉盈虧</param>
        /// <param name="commission">手續費</param>
        /// <param name="deliverycommission">交割手續費</param>
        ///
 
 <returns></returns>
        private decimal BalanceExpression(decimal prebalance, decimal deposit, decimal withdraw, decimal closeprofit, decimal positionprofit, decimal commission, decimal deliverycommission) {
            return prebalance + deposit - withdraw + closeprofit + positionprofit - commission - deliverycommission;
        }

        /// <summary>
        /// 手續費公式 [(手數*按手數手續費率)+(手數*成交價*合約乘數*按金額手續費率)]
        /// </summary>
        /// <param name="volume">手數</param>
        /// <param name="tradeprice">成交價</param>
        /// <param name="volumemultiple">合約乘數</param>
        /// <param name="ratiobyvolume">按手數手續費率</param>
        /// <param name="ratiobymoney">按金額手續費率</param>
        /// <returns></returns>
        private decimal CommissionExpression(int volume, decimal tradeprice, int volumemultiple, decimal ratiobyvolume, decimal ratiobymoney) {
            return (volume * ratiobyvolume) + (volume * tradeprice * volumemultiple * ratiobymoney);
        }

        /// <summary>
        /// 平倉盈虧公式 [(成交價-開倉價或昨結算價)*手數*合約乘數]
        /// </summary>
        /// <param name="direction">買賣方向</param>
        /// <param name="tradeprice">成交價</param>
        /// <param name="tradeprice2">開倉價或昨結算價</param>
        /// <param name="volume">手數</param>
        /// <param name="volumemultiple">合約乘數</param>
        /// <returns></returns>
        private decimal CloseProfitExpresson(string direction, decimal tradeprice, decimal tradeprice2, int volume, int volumemultiple) {
            if (direction == dataManager.TradeConst.Direction.Sell) {
                return (tradeprice - tradeprice2) * volume * volumemultiple;
            }
            else {
                return (tradeprice2 - tradeprice) * volume * volumemultiple;
            }
        }

        /// <summary>
        /// 保證金公式 [(手數*按手數保證金率)+(手數*結算價*合約乘數*按金額保證金率)]
        /// </summary>
        /// <param name="volume">手數</param>
        /// <param name="settlementprice">結算價</param>
        /// <param name="volumemultiple">合約乘數</param>
        /// <param name="ratiobyvolume">按手數保證金率</param>
        /// <param name="ratiobymoney">按金額保證金率</param>
        /// <returns></returns>
        private decimal MarginExpresson(int volume, decimal settlementprice, int volumemultiple, decimal ratiobyvolume, decimal ratiobymoney) {
            return (volume * ratiobyvolume) + (volume * settlementprice * volumemultiple * ratiobymoney);
        }

        /// <summary>
        /// 交易所保證金公式 [(手數*結算價*合約乘數*按金額保證金率)]
        /// </summary>
        /// <param name="volume">手數</param>
        /// <param name="settlementprice">結算價</param>
        /// <param name="volumemultiple">合約乘數</param>
        /// <param name="ratiobymoney">按金額保證金率</param>
        /// <returns></returns>
        private decimal ExchangeMarginExpresson(int volume, decimal settlementprice, int volumemultiple, decimal ratiobymoney) {
            return (volume * settlementprice * volumemultiple * ratiobymoney);
        }

        /// <summary>
        /// 持倉盈虧公式 [((結算價-開倉價)或(開倉價-結算價))*手數*合約乘數]
        /// </summary>
        /// <param name="direction">方向</param>
        /// <param name="openpriceOrlastsettlementprice">開倉價或昨結算價</param>
        /// <param name="settlementprice">結算價</param>
        /// <param name="volume">手數</param>
        /// <param name="volumemultiple">合約乘數</param>
        /// <returns></returns>
        private decimal PositionProfitExpresson(string direction, decimal openpriceOrlastsettlementprice, decimal settlementprice, int volume, int volumemultiple) {
            if (direction == dataManager.TradeConst.Direction.Buy) {
                return (settlementprice - openpriceOrlastsettlementprice) * volume * volumemultiple;
            }
            else {
                return (openpriceOrlastsettlementprice - settlementprice) * volume * volumemultiple;
            }
        }
        #endregion

期貨結算 期貨算法公式